| /* |
| * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| package com.sun.tools.doclets.internal.toolkit.builders; |
| |
| import com.sun.tools.doclets.internal.toolkit.*; |
| import com.sun.tools.doclets.internal.toolkit.util.*; |
| import java.io.*; |
| import java.util.*; |
| import org.xml.sax.*; |
| import org.xml.sax.helpers.DefaultHandler; |
| import javax.xml.parsers.*; |
| |
| /** |
| * Parse the XML that specified the order of operation for the builders. This |
| * Parser uses SAX parsing. |
| * |
| * @author Jamie Ho |
| * @since 1.5 |
| * @see SAXParser |
| */ |
| public class LayoutParser extends DefaultHandler { |
| |
| /** |
| * The map of XML elements that have been parsed. |
| */ |
| private Map<String,List<Object>> xmlElementsMap; |
| |
| private Configuration configuration; |
| private static LayoutParser instance; |
| private String currentRoot; |
| private boolean isParsing; |
| |
| /** |
| * This class is a singleton. |
| */ |
| private LayoutParser(Configuration configuration) { |
| xmlElementsMap = new HashMap<String,List<Object>>(); |
| this.configuration = configuration; |
| } |
| |
| /** |
| * Return an instance of the BuilderXML. |
| * |
| * @param configuration the current configuration of the doclet. |
| * @return an instance of the BuilderXML. |
| */ |
| public static LayoutParser getInstance(Configuration configuration) { |
| if (instance == null) { |
| instance = new LayoutParser(configuration); |
| } |
| return instance; |
| } |
| |
| /** |
| * Parse the XML specifying the layout of the documentation. |
| * |
| * @return List the list of XML elements parsed. |
| */ |
| public List parseXML(String root) { |
| if (xmlElementsMap.containsKey(root)) { |
| return (List) xmlElementsMap.get(root); |
| } |
| try { |
| List<Object> xmlElements = new ArrayList<Object>(); |
| xmlElementsMap.put(root, xmlElements); |
| currentRoot = root; |
| isParsing = false; |
| SAXParserFactory factory = SAXParserFactory.newInstance(); |
| SAXParser saxParser = factory.newSAXParser(); |
| InputStream in = configuration.getBuilderXML(); |
| saxParser.parse(in, this); |
| return xmlElements; |
| } catch (Throwable t) { |
| t.printStackTrace(); |
| throw new DocletAbortException(); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void startElement(String namespaceURI, String sName, String qName, |
| Attributes attrs) |
| throws SAXException { |
| if (isParsing || qName.equals(currentRoot)) { |
| isParsing = true; |
| List<Object> xmlElements = xmlElementsMap.get(currentRoot); |
| xmlElements.add(qName); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void endElement(String namespaceURI, String sName, String qName) |
| throws SAXException { |
| if (! isParsing) { |
| isParsing = false; |
| return; |
| } |
| List<Object> xmlElements = xmlElementsMap.get(currentRoot); |
| if (xmlElements.get(xmlElements.size()-1).equals(qName)) { |
| return; |
| } else { |
| List<Object> subElements = new ArrayList<Object>(); |
| int targetIndex = xmlElements.indexOf(qName); |
| int size = xmlElements.size(); |
| for (int i = targetIndex; i < size; i++) { |
| subElements.add(xmlElements.get(targetIndex)); |
| xmlElements.remove(targetIndex); |
| } |
| //Save the sub elements as a list. |
| xmlElements.add(subElements); |
| } |
| isParsing = ! qName.equals(currentRoot); |
| } |
| } |